Portable exercise device



FIG. 1. is a top-right perspective view of a portable exercise device, showing my new design in a condition for use;

FIG. 2. is a rear elevation view shown in a condition of use thereof;

FIG. 3. is a right side elevation view shown in a condition of use thereof;

FIG. 4. is a top plan view thereof;

FIG. 5. is a bottom plan view thereof;

FIG. 6. is a right side elevation view thereof;

FIG. 7. is a left side elevation view thereof;

FIG. 8. is a bottom right perspective view shown in a partially folded configuration thereof; and,

FIG. 9. is a top right perspective view shown in a folded configuration thereof.

The broken lines in the drawings are for the purpose of illustrating environmental structure, which form no part of the claimed design. 

CLAIM The ornamental design for a portable exercise device, as shown and described. 